Sperry Symposium 2019 - Brad Wilcox

(40:23)

Sperry Symposium 2014 - Bruce C. Hafen

(1:26)

Sperry Symposium 2018 - Brad Wilcox

(43:2)

Sperry Symposium 2016 - Michael MacKay, Gerrit Dirkmaat, Anthony Sweat

(53:27)

Sperry Symposium 2005 - Richard Turley

(29:52)

Sperry Symposium 2014 - Robert L. Millet

(45:1econd)

Sperry Symposium 2009 - Kerry Muhlestein

(50:21)